From owner-freebsd-questions  Wed Jan  1 09:13:08 1997
Return-Path: <owner-questions>
Received: (from root@localhost)
          by freefall.freebsd.org (8.8.4/8.8.4) id JAA16402
          for questions-outgoing; Wed, 1 Jan 1997 09:13:08 -0800 (PST)
Received: from cisco.it ([194.183.8.2])
          by freefall.freebsd.org (8.8.4/8.8.4) with ESMTP id JAA16397
          for <questions@freebsd.org>; Wed, 1 Jan 1997 09:12:56 -0800 (PST)
Received: from pentium-120 (ppp-06.cisco.it [194.183.8.35]) by cisco.it (8.7.5/8.7.3) with SMTP id SAA11419 for <questions@freebsd.org>; Wed, 1 Jan 1997 18:08:47 +0100 (MET)
Date: Wed, 1 Jan 1997 18:08:47 +0100 (MET)
Message-Id: <199701011708.SAA11419@cisco.it>
X-Sender: cp011@posta.cisco.it
X-Mailer: Windows Eudora Light Version 1.5.2
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
To: questions@freebsd.org
From: Antonio Nati <A.Nati@cisco.it>
Subject: mail exec and setuid
Sender: owner-questions@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

I'm trying to make a program that should send automatically mail to other users.

It forks and the child part makea an exec to the mail program.

All is fine but when I do setuid() and setgid() in order to look like
another user (popuser, uid=1000). In that case I have the following messages:

Jan  1 17:24:54 www sendmail[323]: NOQUEUE: SYSERR: putoutmsg (NO-HOST):
error on output channel sending "451 queuename: Cannot create "qfRAA00323"
in "/var/spool/mqueue" (euid=1000): Permission denied": Input/output error
Jan  1 17:24:54 www sendmail[323]: NOQUEUE: SYSERR: putoutmsg (NO-HOST):
error on output channel sending "451 queuename: Cannot create "qfRAA00323"
in "/var/spool/mqueue" (euid=1000): Permission denied": Input/output error
Jan  1 17:24:54 www sendmail[323]: NOQUEUE: SYSERR(provapop): queuename:
Cannot create "qfRAA00323" in "/var/spool/mqueue" (euid=1000): Permission denied
Jan  1 17:24:54 www sendmail[323]: NOQUEUE: SYSERR(provapop): queuename:
Cannot create "qfRAA00323" in "/var/spool/mqueue" (euid=1000): Permission denied

Note that if I send the mail after logging as "popuser" I don't have any
problem, as well as I don't have any problem if the program makes setuid()
like root.

Many thanks,

Tonino